$2-17.$ Compute $L,L_o,L_i,$ and the true half$-$station chords needed for staking:

$($a$)$ Curves $120ft$ outside and $120ft$ inside the curve in problem $2-1($b$).$

Answers: $L_0=691\mathrm{.}74$;$L_i=560\mathrm{.}60$;$C_i$ on center line $=50\mathrm{.}00$; $c_o=55\mathrm{.}23$;$c_i=44\mathrm{.}76.$

$($b$)$ Curves $175ft$ outside and $175ft$ inside the curve in problem $2-1($c$).$ Answers: $L_{}=650\mathrm{.}13$;$L_i=382\mathrm{.}13$;$c_i$ on center line $=49\mathrm{.}99$; $c_0=62\mathrm{.}97$;$c_i=37\mathrm{.}01.$